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May 26, 2015

Homework Help: trigo

Posted by anjelica318 on Saturday, December 13, 2008 at 6:52pm.

how do i verify these?

1-sin^2B
1. ----------- = csc^2B-sec^2B
sin^2Bcos^B

2. cos(2a+a) = 4cos^3a-3cosa

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